2. Backgroud

In this chapter, we will present and explain some core aspects necessary to fully understand the exposed content in the following sections, such as state-of-the-art techniques and the developed solution.

In the last few years, Artificial Intelligence (AI) has been playing an increasingly important role in almost every aspect of modern society. Subsequently, Machine Learning (ML) has found itself as an alternative to traditional solutions in multiple fields. [InternationalJoITaEEIJITEEVD19]

There are two main types of approaches regarding IR from documents. The classical approaches are based on lexical search, whereas the more recent approaches are based on semantic search.